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  #1  
Old 12th February 2014
blaine blaine is offline
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Default Tube frame race videos

Does anybody have any road racing footage of tube frame buells like X1's?? I've searched the net and can't find much. Plus any pictures or list of mods they have done to them to make them work better. Thanks!!
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  #2  
Old 12th February 2014
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steelworker steelworker is offline
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Can't say as I've ever seen tubers being raced, but...

Possible engine mods are the same as for Sportsters (i.e. headwork, big bore conversions, cams, uprated clutch, etc.).

The Buell Pro-Race exhaust system is very good, but difficult to find. Other aftermarket systems are still available.

Twin-disc conversions are available for the front end.

Mikuni carbs fit Buells as well as Sporties, and the ECM Spy program is very good for tuning fuel-injected models (i.e. X1). Air filters are available from NRHS and Hammer Performance, among others.

There are numerous possibilities for fitting a better rear shock, and uprated springs for the forks.

NRHS make a billet top front engine mount for tubers (the stock one is prone to breaking).

Aftermarket rearsets are (or at least were) available.

A UK-based company has started making aluminium gas tanks for some Buells. Metmachex in the UK make a very nice aluminium oil tank.
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  #3  
Old 12th February 2014
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All new rubber mounts and a Penske rear shock will do wonders for the handling. The oem shock is terrible at best and many of them are pretty whipped by now. The rubber mounts deteriorate with age and it does affect handling even though they have not failed.

Are you looking to improve a street bike or building a track day bike?
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Old 12th February 2014
blaine blaine is offline
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I think they used to race them in pro thunder or thunder. Its a street bike that gets ridden like a race bike.
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Old 12th February 2014
NRHS Sales NRHS Sales is offline
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I used to do lots of track days with a 98S1WL and I own a 2000 X1 with extensive mods. Feel free to contact me by phone at 303-7602-1600 or e-mail at sales@nrhsperformance.com if you want to know the ins and outs of what I did.
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  #6  
Old 13th February 2014
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Default

handling is a priority I would start with the items in my first post. Next on the list would be a steering damper and heavier front springs.

The Performance Machine rims are a half inch wider in the back if that matters.

It was not uncommon for the Pro Thunder bikes to run a modified front shock mount which moved the front shock mount forward about a half inch. This raises the rear about an inch which quickens up the steering but more importantly increases anti squat in the rear suspension. It was also not uncommon to increase rear swing arm length by an inch. Both of these changes make subtle but important changes in the dynamics of a race bike but are not worth the effort in a street bike. There were also some frame modifications that were common but many of them were incorporated into the later tube framed bikes like yours. It was common to reduce the effect of the rear isolators to firm up the back half. This was done with special aluminum inserts. They make a difference in feel and really tie the rear of the bike together but dramatically increase vibration. They are not a good trade off on a street bike. Improving the front brake can get very expensive on these bikes. Some say it is not needed. I disagree. There were some Pro Series rear sets available at one time that some of the roadracers used. They move the pegs up some and back a lot. While no longer available they show up on eBay from time to time. I have used them but prefer the stock arrangement even for track use.

The shock, new mounts, a damper, upgraded front springs, and fresh premium rubber amount to a considerable investment in time, energy and money but they will make a huge difference in how the bike acts.

Last edited by maru; 13th February 2014 at 16:50..
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Old 13th February 2014
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Quote:
Originally Posted by maru View Post
Improving the front brake can get very expensive on these bikes. Some say it is not needed. I disagree.
I have been on a track day with a bunch of Buellers. All were experiencing brake fade after a few laps, except for the very few with a twin disc conversion.
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Old 14th February 2014
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Quote:
Originally Posted by steelworker View Post
I have been on a track day with a bunch of Buellers. All were experiencing brake fade after a few laps, except for the very few with a twin disc conversion.
Yea, it is kind of weird because when Eric was between his stint at HD and Buell he started a company called PRO if my memory serves me and they specialized in really trick brakes. He even developed a process where thin sheets of steel were welded onto an aluminum core, resulting in a very light brake rotor that had the capacity to shed heat like crazy.
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Old 14th February 2014
blaine blaine is offline
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Got the isolaters to put on. Gonna get a Penske shock for it also. But first I have to fix the motor from last years disaster. Pinion nut came loose. Tore up a lot of the motor. What's the best way to dual brake the front end? Would I be better off changing the front end to a gsxr or something similar? I've got a gsxr front end on my sportster. Its not hard to convert the steering stem. I did it a few years ago.
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Old 14th February 2014
blaine blaine is offline
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I also just changed the x1 tail section to a fire bolt tail. Looks good. Needs paint but I like it.
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